photosgallery/contentharvesterplugin/src/glxcontentharvesterpluginalbums.cpp
changeset 0 4e91876724a2
child 1 9ba538e329bd
equal deleted inserted replaced
-1:000000000000 0:4e91876724a2
       
     1 /*
       
     2  * Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies). 
       
     3  * All rights reserved.
       
     4  * This component and the accompanying materials are made available
       
     5  * under the terms of "Eclipse Public License v1.0"
       
     6  * which accompanies this distribution, and is available
       
     7  * at the URL "http://www.eclipse.org/legal/epl-v10.html".
       
     8  *
       
     9  * Initial Contributors:
       
    10  * Nokia Corporation - initial contribution.
       
    11  *
       
    12  * Contributors:
       
    13  *
       
    14  * Description:    Updates CPS storage for albums collection
       
    15  *
       
    16  */
       
    17 
       
    18 // INCLUDE FILES
       
    19 
       
    20 #include <mmf/common/mmfcontrollerpluginresolver.h>
       
    21 #include <liwservicehandler.h>
       
    22 
       
    23 #include <glxuistd.h>
       
    24 #include <glxicons.mbg>   // Glx Icons
       
    25 #include <glxcollectionpluginalbums.hrh> //for  KGlxCollectionPluginAlbumsImplementationUid
       
    26 #include <glxthumbnailattributeinfo.h>  // for KGlxMediaIdThumbnail
       
    27 #include <glxattributecontext.h>
       
    28 #include <glxthumbnailcontext.h>
       
    29 #include <glxtracer.h>                //for tracer
       
    30 #include <glxlog.h>                   // for log
       
    31 #include <mglxmedialist.h>       // for MGlxMediaList
       
    32 #include <glxcollectiongeneraldefs.h>
       
    33 #include <glxgallery.hrh>               // for KGlxGalleryApplicationUid
       
    34 #include <glxmediaid.h>
       
    35 #include <glxerrormanager.h>      
       
    36 
       
    37 #include "glxcontentharvesterpluginalbums.h"
       
    38 #include "glxcontentharvesterplugin.hrh"
       
    39 #include "glxmapconstants.h"
       
    40 
       
    41 
       
    42 // ============================ MEMBER FUNCTIONS ==============================
       
    43 LOCAL_C TInt TimerCallbackL( TAny* aPtr )
       
    44     {
       
    45     TRACER( "CGlxContentHarvesterPluginAlbums::TimerCallbackL" );
       
    46     static_cast<CGlxContentHarvesterPluginAlbums*>(aPtr)->UpdateDataL();
       
    47     return KErrNone;
       
    48     }
       
    49 
       
    50 // ----------------------------------------------------------------------------
       
    51 // Constructor
       
    52 // ----------------------------------------------------------------------------
       
    53 //
       
    54 CGlxContentHarvesterPluginAlbums::CGlxContentHarvesterPluginAlbums( 
       
    55         MLiwInterface* aCPSInterface,
       
    56         MGlxContentHarvesterPlugin* aCHplugin )
       
    57     {
       
    58     TRACER( "CGlxContentHarvesterPluginAlbums::CGlxContentHarvesterPluginAlbums" );
       
    59     iCPSInterface = aCPSInterface;
       
    60     SetCHPlugin(aCHplugin);
       
    61     }
       
    62 
       
    63 // ----------------------------------------------------------------------------
       
    64 // Symbian 2nd phase constructor can leave.
       
    65 // ----------------------------------------------------------------------------
       
    66 //
       
    67 void CGlxContentHarvesterPluginAlbums::ConstructL()
       
    68     {
       
    69     TRACER( "CGlxContentHarvesterPluginAlbums::ConstructL" );
       
    70     
       
    71     //Call the base class ConstructL
       
    72     CGlxContentHarvesterPluginBase::ConstructL(EMbmGlxiconsQgn_prop_image_notcreated);
       
    73     
       
    74     iPeriodic = CPeriodic::NewL( CActive::EPriorityLow );
       
    75     iThumbnailContext = CGlxThumbnailContext::NewL(&iThumbnailIterator);
       
    76         
       
    77     //Register/Subscribe with matrix menu for the notifications 
       
    78     GetInterfaceForNotificationL();
       
    79     SetupPublisherL(KItemIndexAlbums);
       
    80     RequestCpsNotificationL(KItemIndexAlbums);
       
    81     HandleStateChangeL(KItemIndexAlbums);
       
    82     }
       
    83 
       
    84 // ----------------------------------------------------------------------------
       
    85 // Two-phased constructor.
       
    86 // ----------------------------------------------------------------------------
       
    87 //
       
    88 CGlxContentHarvesterPluginAlbums* CGlxContentHarvesterPluginAlbums::NewLC( 
       
    89         MLiwInterface* aCPSInterface,
       
    90         MGlxContentHarvesterPlugin* aCHplugin )
       
    91     {
       
    92     TRACER( "CGlxContentHarvesterPluginAlbums::NewL" );
       
    93     CGlxContentHarvesterPluginAlbums* self = new ( ELeave ) CGlxContentHarvesterPluginAlbums( aCPSInterface,aCHplugin );
       
    94     CleanupStack::PushL(self);
       
    95     self->ConstructL();
       
    96     return self;
       
    97     }
       
    98 
       
    99 // ---------------------------------------------------------------------------
       
   100 // Destructor
       
   101 // ---------------------------------------------------------------------------
       
   102 //
       
   103 CGlxContentHarvesterPluginAlbums::~CGlxContentHarvesterPluginAlbums()
       
   104     {
       
   105     TRACER( "CGlxContentHarvesterPluginAlbums::~CGlxContentHarvesterPluginAlbums" );
       
   106 
       
   107     DestroyMedialist();
       
   108     if ( iPeriodic )
       
   109         {
       
   110         iPeriodic->Cancel();
       
   111         }
       
   112     delete iPeriodic;
       
   113     }
       
   114 
       
   115 // ----------------------------------------------------------------------------
       
   116 // CGlxContentHarvesterPluginAlbums::UpdateDataL()
       
   117 // ----------------------------------------------------------------------------
       
   118 //
       
   119 void CGlxContentHarvesterPluginAlbums::UpdateDataL() 
       
   120     {
       
   121     TRACER( "CGlxContentHarvesterPluginAlbums::UpdateDataL" );
       
   122     if(iMediaList && iMediaList->Count() && iPreviewItemCount.Count() )
       
   123         {
       
   124         GLX_LOG_INFO1("CGlxContentHarvesterPluginAlbums::UpdateDataL(),iProgressIndex=%d",iProgressIndex);
       
   125         TInt ret = UpdateItem(iPreviewItemCount[iProgressIndex]);
       
   126         if(ret != KErrNotFound)
       
   127             {
       
   128             //Updates the thumbnail in the collection 
       
   129             UpdateDataInCPSL(ret);
       
   130             }
       
   131         else
       
   132             {
       
   133             UpdateDataInCPSL(GetBitmapHandle());
       
   134             }
       
   135         }
       
   136     else
       
   137         {
       
   138         // Show previous thumbnail until the new thumbnail is
       
   139         // fecthed.Added this check to avoid flicker
       
   140         if(!GetCHPlugin()->IsRefreshNeeded() || (iMediaList->Count() == 0))
       
   141         	{
       
   142 			//Don't Show the Thumbnail/Show nothing
       
   143 			GLX_LOG_INFO("CGlxContentHarvesterPluginAlbums::UpdateDataL() --O");
       
   144 			UpdateDataInCPSL(GetBitmapHandle());
       
   145         	}
       
   146         
       
   147         }
       
   148     }
       
   149 
       
   150 // ----------------------------------------------------------------------------
       
   151 // CGlxContentHarvesterPluginAlbums::HandleNotifyL()
       
   152 // ----------------------------------------------------------------------------
       
   153 //
       
   154 TInt CGlxContentHarvesterPluginAlbums::HandleNotifyL(
       
   155         TInt /* aCmdId*/,
       
   156         TInt/* aEventId */,
       
   157         CLiwGenericParamList& /*aEventParamList*/,
       
   158         const CLiwGenericParamList& /*aInParamList*/ )
       
   159     {
       
   160     TRACER( "CGlxContentHarvesterPluginAlbums::HandleNotifyL" );
       
   161     HandleStateChangeL(KItemIndexAlbums);
       
   162     return KErrNone;
       
   163     }
       
   164 
       
   165 // ----------------------------------------------------------------------------
       
   166 // CGlxContentHarvesterPluginAlbums::HandleItemChanged()
       
   167 // ----------------------------------------------------------------------------
       
   168 //
       
   169 void CGlxContentHarvesterPluginAlbums::HandleItemChanged()
       
   170     {
       
   171     TRACER("CGlxContentHarvesterPluginAlbums::HandleItemChanged");
       
   172 
       
   173     iProgressIndex = 0;
       
   174     iPreviewItemCount.Reset();
       
   175 
       
   176     TSize gridIconSize = GetGridIconSize();
       
   177     TMPXAttribute thumbnailAttribute(KGlxMediaIdThumbnail, 
       
   178             GlxFullThumbnailAttributeId( ETrue,  gridIconSize.iWidth, gridIconSize.iHeight ) );
       
   179     if(iMediaList)  
       
   180         {
       
   181         TInt count = iMediaList->Count();
       
   182         GLX_LOG_INFO1("CGlxContentHarvesterPluginAlbums:: HandleItemChanged ,count=%d",count);
       
   183 
       
   184         TBool inFocus = IsFocused();
       
   185         for(TInt aItemIndex = 0; aItemIndex < count; aItemIndex++)
       
   186             {
       
   187             const TGlxMedia& item = iMediaList->Item( aItemIndex );
       
   188             const CGlxThumbnailAttribute* value = item.ThumbnailAttribute( thumbnailAttribute );
       
   189             if (value)
       
   190                 {
       
   191                 iPreviewItemCount.InsertInOrder(aItemIndex);
       
   192                 if(!inFocus)
       
   193                     {
       
   194                     //if the collection is in Focus,retrieve only one thumbnail and break
       
   195                     GLX_LOG_INFO1("CGlxContentHarvesterPluginAlbums::HandleItemChanged,iRange=1,aItemIndex=%d",aItemIndex);
       
   196                     break;
       
   197                     }
       
   198                 else if(iPreviewItemCount.Count() == KPreviewThumbnailFetchCount ||
       
   199                         iPreviewItemCount.Count() == count )
       
   200                     {
       
   201                     //if the collection is not in Focus,retrieve 15 thumbnail and break
       
   202                     GLX_LOG_INFO1("CGlxContentHarvesterPluginAlbums::HandleItemChanged,iRange=15,aItemIndex=%d",aItemIndex);
       
   203                     break;
       
   204                     }
       
   205 
       
   206                 }
       
   207             }
       
   208         }
       
   209     }
       
   210 
       
   211 // ----------------------------------------------------------------------------
       
   212 // CGlxContentHarvesterPluginAlbums::UpdateDataInCPSL()
       
   213 // ----------------------------------------------------------------------------
       
   214 // 
       
   215 void CGlxContentHarvesterPluginAlbums::UpdateDataInCPSL(TInt aHandle) 
       
   216     {
       
   217     TRACER( "CGlxContentHarvesterPluginAlbums::UpdateDataInCPSL" );
       
   218     //update data in CPS
       
   219     _LIT(KExamplePluginPub,"photossuite");
       
   220     _LIT(KContTypeText,"albums");
       
   221     _LIT(KContId1,"category1");
       
   222 
       
   223     if(iCPSInterface && iMediaList )
       
   224         {
       
   225         CLiwGenericParamList* inParamList = CLiwGenericParamList::NewLC();
       
   226         CLiwGenericParamList* outParamList = CLiwGenericParamList::NewLC();
       
   227 
       
   228         FillInputListWithDataL(inParamList, KExamplePluginPub, KContTypeText , 
       
   229                 KContId1, aHandle);
       
   230 
       
   231         iCPSInterface->ExecuteCmdL( KAdd,  *inParamList, *outParamList );
       
   232         CleanupStack::PopAndDestroy(outParamList);
       
   233         CleanupStack::PopAndDestroy(inParamList);
       
   234         }
       
   235     }
       
   236 
       
   237 // ----------------------------------------------------------------------------
       
   238 // CGlxContentHarvesterPluginAlbums::UpdateItem()
       
   239 // ----------------------------------------------------------------------------
       
   240 //
       
   241 TInt CGlxContentHarvesterPluginAlbums::UpdateItem(TInt aItemIndex)
       
   242     {
       
   243     TRACER( "CGlxContentHarvesterPluginAlbums::UpdateItem" );
       
   244     const TGlxMedia& item = iMediaList->Item(aItemIndex);
       
   245     TSize gridIconSize = GetGridIconSize();
       
   246     TMPXAttribute thumbnailAttribute(KGlxMediaIdThumbnail, 
       
   247             GlxFullThumbnailAttributeId( ETrue,  gridIconSize.iWidth, gridIconSize.iHeight ) );
       
   248     GLX_LOG_INFO1("CGlxContentHarvesterPluginAlbums::UpdateItem,aItemIndex=%d ",aItemIndex);
       
   249     const CGlxThumbnailAttribute* value = item.ThumbnailAttribute( thumbnailAttribute );
       
   250     if (value)
       
   251         {
       
   252         GLX_LOG_INFO1("CGlxContentHarvesterPluginAlbums::UpdateItem,iProgressIndex=%d ",iProgressIndex);
       
   253         iProgressIndex++;
       
   254         if (iProgressIndex >= KPreviewThumbnailFetchCount || 
       
   255                 iProgressIndex >= iPreviewItemCount.Count() ||
       
   256                 iProgressIndex >= iMediaList->Count())
       
   257             {
       
   258             iProgressIndex = 0;
       
   259             }
       
   260         return value->iBitmap->Handle();
       
   261         }
       
   262     return KErrNotFound;
       
   263     }
       
   264 
       
   265 // ----------------------------------------------------------------------------
       
   266 // CGlxContentHarvesterPluginAlbums::ActivateL()
       
   267 // ----------------------------------------------------------------------------
       
   268 //
       
   269 void CGlxContentHarvesterPluginAlbums::ActivateL( TBool aOn )
       
   270     {
       
   271     TRACER( "CGlxContentHarvesterPluginAlbums::ActivateL" );
       
   272 
       
   273     GLX_LOG_INFO1("CGlxContentHarvesterPluginAlbums::ActivateL aOn =%d",aOn);
       
   274     SetFocus(aOn);
       
   275 
       
   276     if (IsMatrixMenuInForegroundL() && aOn && !iPeriodic->IsActive() )
       
   277         {
       
   278         if(GetCHPlugin()->IsRefreshNeeded())
       
   279             {
       
   280             //Update the rest of all the collections on receving the focus...
       
   281             GetCHPlugin()->UpdatePlugins(aOn);     
       
   282             }
       
   283         else
       
   284             {
       
   285             //As the collection is not updated by the contentharvester plugin
       
   286             //to update the thumbnails on the focus , need to call the below function
       
   287             UpdatePreviewThumbnailListL();
       
   288             }
       
   289 
       
   290         iPeriodic->Start( KTimerInterval, 
       
   291                 KTimerInterval, 
       
   292                 TCallBack( TimerCallbackL, this ) );
       
   293         }
       
   294     else if ( !aOn )
       
   295         {
       
   296          if(!IsMatrixMenuInForegroundL())
       
   297             {
       
   298             //use case:Matrix Menu is exited, by entering into grid view,application view,capture mode...
       
   299             //Need to destroy all the collection's observers and context
       
   300             GLX_LOG_INFO1("CGlxContentHarvesterPluginAlbums::ActivateL !aOn =%d and matrix not in foreground",aOn);
       
   301             GetCHPlugin()->UpdatePlugins(aOn);
       
   302             }
       
   303         iPeriodic->Cancel();
       
   304         }
       
   305     }
       
   306 
       
   307 // ----------------------------------------------------------------------------
       
   308 // CGlxContentHarvesterPluginAlbums::HandleItemAddedL
       
   309 // ----------------------------------------------------------------------------
       
   310 //
       
   311 void CGlxContentHarvesterPluginAlbums::HandleItemAddedL(TInt /*aStartIndex*/, TInt /*aEndIndex*/, 
       
   312         MGlxMediaList* /*aList*/)
       
   313     {
       
   314     TRACER( "CGlxContentHarvesterPluginAlbums::HandleItemAddedL" );
       
   315     }
       
   316 
       
   317 // ---------------------------------------------------------------------------
       
   318 // CGlxContentHarvesterPluginAlbums::HandleMediaL
       
   319 // ---------------------------------------------------------------------------
       
   320 //
       
   321 void CGlxContentHarvesterPluginAlbums::HandleMediaL(TInt /*aListIndex*/, 
       
   322         MGlxMediaList* /*aList*/)
       
   323     {
       
   324     TRACER( "CGlxContentHarvesterPluginAlbums::HandleMediaL" );
       
   325     } 
       
   326 
       
   327 // ---------------------------------------------------------------------------
       
   328 // CGlxContentHarvesterPluginAlbums::HandleItemRemovedL
       
   329 // ---------------------------------------------------------------------------
       
   330 //
       
   331 void CGlxContentHarvesterPluginAlbums::HandleItemRemovedL(TInt /*aStartIndex*/, 
       
   332         TInt /* aEndIndex */, MGlxMediaList* /*aList*/)
       
   333     {
       
   334     TRACER( "CGlxContentHarvesterPluginAlbums::HandleItemRemovedL" );
       
   335     }
       
   336 
       
   337 // ---------------------------------------------------------------------------
       
   338 // CGlxContentHarvesterPluginAlbums::HandleItemModifiedL
       
   339 // ---------------------------------------------------------------------------
       
   340 //
       
   341 void CGlxContentHarvesterPluginAlbums::HandleItemModifiedL(
       
   342         const RArray<TInt>& /*aItemIndexes*/, 
       
   343         MGlxMediaList* /*aList*/)
       
   344     {
       
   345     TRACER( "CGlxContentHarvesterPluginAlbums::HandleItemModifiedL" );
       
   346     }
       
   347 
       
   348 // ---------------------------------------------------------------------------
       
   349 // CGlxContentHarvesterPluginAlbums::HandleAttributesAvailableL
       
   350 // ---------------------------------------------------------------------------
       
   351 //
       
   352 void CGlxContentHarvesterPluginAlbums::HandleAttributesAvailableL(TInt aItemIndex, 
       
   353         const RArray<TMPXAttribute>& aAttributes, MGlxMediaList* aList)
       
   354     {
       
   355     TRACER( "CGlxContentHarvesterPluginAlbums::HandleAttributesAvailableL" );
       
   356     TSize gridIconSize = GetGridIconSize();
       
   357     TMPXAttribute thumbnailAttribute(KGlxMediaIdThumbnail, 
       
   358             GlxFullThumbnailAttributeId( ETrue,  gridIconSize.iWidth, gridIconSize.iHeight ) );
       
   359 
       
   360     TIdentityRelation< TMPXAttribute > match ( &TMPXAttribute::Match );
       
   361 
       
   362     GLX_LOG_INFO1("CGlxContentHarvesterPluginAlbums::HandleAttributesAvailableL =%d ",aItemIndex);
       
   363     
       
   364     if (KErrNotFound != aAttributes.Find( thumbnailAttribute, match ))
       
   365         {
       
   366         const TGlxMedia& item = aList->Item( aItemIndex );
       
   367         const CGlxThumbnailAttribute* value = item.ThumbnailAttribute( thumbnailAttribute );
       
   368         if (value)
       
   369             {
       
   370             GLX_LOG_INFO("CGlxContentHarvesterPluginAlbums::HandleAttributesAvailableL Thumbnail is present ");
       
   371             iPreviewItemCount.InsertInOrder(aItemIndex);
       
   372             //if the collection on the matrix menu is not focused,then show only one thumbnail
       
   373             if(!IsFocused())
       
   374                 {
       
   375                 //if one thumbnail is fetched,it is sufficent when the collection is not in focus.
       
   376                 //remove the observer as client need not listen to the callbacks 
       
   377                 GLX_LOG_INFO("CGlxContentHarvesterPluginAll::HandleAttributesAvailableL,one thumbnail fetched");
       
   378                 UpdateDataInCPSL( value->iBitmap->Handle());
       
   379                 iMediaList->RemoveMediaListObserver( this );          
       
   380                 }
       
   381             else if (iPreviewItemCount.Count()  == KPreviewThumbnailFetchCount ||
       
   382                     iPreviewItemCount.Count() == aList->Count() )
       
   383                 {
       
   384 
       
   385                 GLX_LOG_INFO1("CGlxContentHarvesterPluginAlbums::HandleAttributesAvailableL,media list count=%d",aList->Count());
       
   386                 //if the PreviewItemCount  equals 15 or if it is eqaul to the total count
       
   387                 //remove the observer as client need not listen to the callbacks 
       
   388                 iMediaList->RemoveMediaListObserver( this );
       
   389                 }
       
   390             }//end of  check against value 
       
   391         }//end of  attribute match
       
   392     }
       
   393 
       
   394 // ---------------------------------------------------------------------------
       
   395 // CGlxContentHarvesterPluginAlbums::HandleFocusChangedL
       
   396 // ---------------------------------------------------------------------------
       
   397 //
       
   398 void CGlxContentHarvesterPluginAlbums::HandleFocusChangedL(
       
   399         NGlxListDefs::TFocusChangeType /*aType*/, 
       
   400         TInt /*aNewIndex*/, 
       
   401         TInt /*aOldIndex*/, 
       
   402         MGlxMediaList* /*aList*/)
       
   403     {
       
   404     TRACER( "CGlxContentHarvesterPluginAlbums::HandleFocusChangedL" );
       
   405     }
       
   406 
       
   407 
       
   408 // ---------------------------------------------------------------------------
       
   409 // CGlxContentHarvesterPluginAlbums::HandleItemSelectedL
       
   410 // ---------------------------------------------------------------------------
       
   411 //
       
   412 void CGlxContentHarvesterPluginAlbums::HandleItemSelectedL(TInt /*aIndex*/, 
       
   413         TBool /*aSelected*/, 
       
   414         MGlxMediaList* /*aList*/)
       
   415     {
       
   416     TRACER( "CGlxContentHarvesterPluginAlbums::HandleItemSelectedL" );
       
   417     }
       
   418 
       
   419 // ---------------------------------------------------------------------------
       
   420 // CGlxContentHarvesterPluginAlbums::HandleMessageL
       
   421 // ---------------------------------------------------------------------------
       
   422 //
       
   423 void CGlxContentHarvesterPluginAlbums::HandleMessageL(const CMPXMessage& /*aMessage*/, 
       
   424         MGlxMediaList* /*aList*/)
       
   425     {
       
   426     TRACER( "CGlxContentHarvesterPluginAlbums::HandleMessageL" );
       
   427     }   
       
   428 
       
   429 // ---------------------------------------------------------------------------
       
   430 // CGlxContentHarvesterPluginAlbums::DestroyMedialist
       
   431 // ---------------------------------------------------------------------------
       
   432 //
       
   433 void CGlxContentHarvesterPluginAlbums::DestroyMedialist()
       
   434     {
       
   435     TRACER( "CGlxContentHarvesterPluginAlbums::DestroyMedialist" );
       
   436     if( iMediaList )
       
   437         {
       
   438         GLX_LOG_INFO("CGlxContentHarvesterPluginAlbums::DestroyMedialist,media list deleted");
       
   439         RemoveContextAndObserver();
       
   440         delete iThumbnailContext;
       
   441         iThumbnailContext = NULL;
       
   442         iMediaList->Close();
       
   443         iMediaList = NULL;
       
   444         }
       
   445     }
       
   446 
       
   447 // ---------------------------------------------------------------------------
       
   448 // CGlxContentHarvesterPluginAlbums::CreateMedialistL
       
   449 // ---------------------------------------------------------------------------
       
   450 //
       
   451 void CGlxContentHarvesterPluginAlbums::CreateMedialistL( )
       
   452     {
       
   453     TRACER( "CGlxContentHarvesterPluginAlbums::CreateMedialistL" );
       
   454     if(!iMediaList)
       
   455         {
       
   456         //if the collection is in focus then , create media list with context of 15 items else
       
   457         // with context of single item.
       
   458         if(IsFocused())
       
   459             {
       
   460             iThumbnailIterator.SetRange( KPreviewThumbnailFetchCount ); 
       
   461             }
       
   462         else
       
   463             {
       
   464             iThumbnailIterator.SetRange( KSinglePreviewThumbnail );
       
   465             }
       
   466 
       
   467         iMediaList = CreateMedialistAndThumbnailContextL( TGlxMediaId( 
       
   468                 KGlxCollectionPluginAlbumsImplementationUid ),iThumbnailContext);
       
   469         AddContextAndObserverL();
       
   470         }
       
   471     }
       
   472 
       
   473 // ---------------------------------------------------------------------------
       
   474 // CGlxContentHarvesterPluginAlbums::UpdatePreviewThumbnailListL
       
   475 // ---------------------------------------------------------------------------
       
   476 //
       
   477 void CGlxContentHarvesterPluginAlbums::UpdatePreviewThumbnailListL( )
       
   478     {
       
   479     TRACER( "CGlxContentHarvesterPluginAlbums::UpdatePreviewThumbnailListL" );
       
   480 
       
   481     //when there is an update of content in the collection
       
   482     //this function is executed or when the collection recives the focus. 
       
   483     if(!iMediaList)
       
   484         {
       
   485         //media list is not created yet,create it.
       
   486         CreateMedialistL( );
       
   487         //This is called to show the preview thumbnails. If no thumbnails are
       
   488         //present, display nothing
       
   489         UpdateDataL();
       
   490         }
       
   491     else
       
   492         {
       
   493         if(GetCHPlugin()->IsRefreshNeeded())
       
   494             {
       
   495             ContainerCacheCleanupL(iMediaList);
       
   496             }
       
   497    		if(IsFocused())
       
   498 	        {
       
   499 	        //1.This loop is executed,when the collection gets focus
       
   500 	        //2.This loop is executed,when the contents are updated for this collection
       
   501 	        //and this collection has focus,so 15 thumbnails are fetched.
       
   502 	        HandleItemChanged();
       
   503 	        iThumbnailIterator.SetRange( KPreviewThumbnailFetchCount );
       
   504 	        RemoveContextAndObserver();
       
   505 	        AddContextAndObserverL();
       
   506 	        }
       
   507 	    else
       
   508 	        {
       
   509 	        //1.This loop is executed,when the contents are updated for this collection
       
   510 	        //and this collection doesn't have the focus,so only one thumbnail is fetched.
       
   511 
       
   512 	        //here we need to fetch only one item 
       
   513 	        //1.if the content is deleted,then creating a context doesn't fetch the attributes
       
   514 	        //2.if the content is added and the content is not the latest as per the sorted order of the
       
   515 	        // media list,then the thumbnails are not fetched.
       
   516 	        // so show the first available thumbnail in the media list.
       
   517 
       
   518 	        HandleItemChanged();
       
   519 	        UpdateDataL();
       
   520 
       
   521 	        //Adding the context doesn't gaurantee we get a call back for
       
   522 	        //Handle attributes available,if the latest item is already fetched.
       
   523 	        //and for the content added for this collection,if it is not latest
       
   524 	        //we will not recieve the attributes .so show the first available thumbnail 
       
   525 	        //in the media list.if there is any new latest content added,the thumbnail will be 
       
   526 	        //fetched and shown.
       
   527 
       
   528 	        iThumbnailIterator.SetRange( KSinglePreviewThumbnail );
       
   529 	        RemoveContextAndObserver();
       
   530 	        AddContextAndObserverL();
       
   531 			}
       
   532         }
       
   533     }
       
   534 
       
   535 // ---------------------------------------------------------------------------
       
   536 // CGlxContentHarvesterPluginAlbums::AddContextAndObserverL
       
   537 // ---------------------------------------------------------------------------
       
   538 //
       
   539 void CGlxContentHarvesterPluginAlbums::AddContextAndObserverL()
       
   540     {
       
   541     TRACER( "CGlxContentHarvesterPluginAlbums::AddRemoveContextAndObserverL" );   
       
   542     if(iMediaList)
       
   543         {
       
   544         iMediaList->AddMediaListObserverL( this );
       
   545         iMediaList->AddContextL(iThumbnailContext, KGlxFetchContextPriorityNormal);
       
   546         }
       
   547     }
       
   548 
       
   549 // ---------------------------------------------------------------------------
       
   550 // CGlxContentHarvesterPluginAlbums::RemoveContextAndObserver
       
   551 // ---------------------------------------------------------------------------
       
   552 //
       
   553 void CGlxContentHarvesterPluginAlbums::RemoveContextAndObserver()
       
   554     {
       
   555     TRACER( "CGlxContentHarvesterPluginAlbums::RemoveContextAndObserver" );   
       
   556     if(iMediaList)
       
   557         {
       
   558         iMediaList->RemoveMediaListObserver( this );
       
   559         iMediaList->RemoveContext(iThumbnailContext);
       
   560         }
       
   561     }
       
   562 
       
   563 // ---------------------------------------------------------------------------
       
   564 // CGlxContentHarvesterPluginAlbums::HandleError
       
   565 // ---------------------------------------------------------------------------
       
   566 //
       
   567 void CGlxContentHarvesterPluginAlbums::HandleError(TInt /*aError*/)
       
   568     {
       
   569     TRACER( "CGlxContentHarvesterPluginAlbums::HandleError" );    
       
   570 
       
   571 #ifdef _DEBUG
       
   572     if(iMediaList)
       
   573         {
       
   574         TInt count=iMediaList->Count();
       
   575         GLX_LOG_INFO1("CGlxContentHarvesterPluginAlbums::HandleError,count=%d",count);
       
   576         for ( TInt i = 0; i < count ; i++ )
       
   577             {
       
   578             const TGlxMedia& item = iMediaList->Item( i );
       
   579             TInt thumbnailError = GlxErrorManager::HasAttributeErrorL(
       
   580                     item.Properties(), KGlxMediaIdThumbnail );
       
   581             GLX_LOG_INFO1("CGlxContentHarvesterPluginAlbums::HandleError,Error=%d ",thumbnailError);
       
   582 
       
   583             }
       
   584         }
       
   585 #endif
       
   586     }
       
   587 
       
   588 // ---------------------------------------------------------------------------
       
   589 // CGlxContentHarvesterPluginAlbums::Count
       
   590 // ---------------------------------------------------------------------------
       
   591 //
       
   592 TInt CGlxContentHarvesterPluginAlbums::Count()
       
   593     {
       
   594     TRACER( "CGlxContentHarvesterPluginAlbums::Count" );    
       
   595     TInt count = KErrNone;
       
   596     if(iMediaList)
       
   597         {
       
   598         count = iMediaList->Count();
       
   599         GLX_LOG_INFO1("GlxCHP:Albums::Count(%d)",count);
       
   600         }
       
   601     return count;
       
   602     }
       
   603 //  End of File
       
   604